243213513 has 8 divisors (see below), whose sum is σ = 324432576. Its totient is φ = 162068400.

The previous prime is 243213499. The next prime is 243213521. The reversal of 243213513 is 315312342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243213513 - 2²⁴ = 226436297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243213533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10293 + ... + 24338.

It is an arithmetic number, because the mean of its divisors is an integer number (40554072).

Almost surely, 2^243213513 is an apocalyptic number.

It is an amenable number.

243213513 is a deficient number, since it is larger than the sum of its proper divisors (81219063).

243213513 is a wasteful number, since it uses less digits than its factorization.

243213513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36975.

The product of its digits is 2160, while the sum is 24.

The square root of 243213513 is about 15595.3041970973. The cubic root of 243213513 is about 624.2078608758.

Adding to 243213513 its reverse (315312342), we get a palindrome (558525855).

The spelling of 243213513 in words is "two hundred forty-three million, two hundred thirteen thousand, five hundred thirteen".